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The little extractor spring buried in your AR bolt is one of those parts nobody thinks about until it starts causing failures to eject and stovepipes. Sprinco's Enhanced 4-Coil version fixes the weak link with a spring engineered to hold consistent tension for the long haul, so your rifle keeps grabbing and pulling spent cases the way it should. This is the 3-pack of springs, giving you one to install now and a couple to stash in the range bag or parts drawer.
What separates these from the cheap stamped springs is the material and the processing. Sprinco winds them from chrome silicon wire stock, then heat treats, stress relieves, and cryogenically processes them for durability that shrugs off heat and long round counts. The wire holds up to roughly 750 degrees Fahrenheit and keeps its pressure across a serious service life, with documented testing well past 200,000 cycles on a single spring.
The 4-Coil is tuned to match the tension of a fresh mil-spec spring rather than crank things way up. That makes it the pick for 18-inch and longer barrels, and it's the go-to for anyone who saves their brass for reloading, since it pulls cases cleanly without beating up the rims. If you're running a shorter carbine or SBR and want more aggressive extraction, the 5-Coil Extra Power version is the better call, but for rifle-length gas systems this is the sweet spot.
Swapping one in is straightforward and needs no permanent changes to your bolt. Drift out the extractor pin, pull the old spring, drop the new Sprinco in place, and reassemble. Most folks knock it out in ten minutes at the bench with basic punches. Keep the spares tucked away and you'll have a fix ready the next time a bolt starts acting up mid-range session.
The Enhanced 4-Coil holds the tension of a fresh mil-spec spring and is aimed at 18-inch and longer barrels. It's the better pick if you save your brass for reloading, since it extracts cleanly without being hard on the case rims. The 5-Coil Extra Power puts out heavier pressure and is meant for shorter carbines and SBRs, or dirtier running conditions.
This listing is the springs only, three Enhanced 4-Coil springs in the pack. Sprinco also sells an upgrade kit version that bundles a mil-spec insert and Viton O-rings if you want those pieces too. If you already have a working insert in your bolt, the spring-only pack is all you need to refresh extraction.
Failures to eject, stovepipes, and cases getting left in the chamber or dragged back into the receiver are classic signs of a tired extractor spring. If you press the extractor with a fingertip and it feels soft or mushy, that's another giveaway. Swapping in a fresh Sprinco spring is a cheap, quick fix that clears up a lot of extraction gremlins.
Not at all, it's a plug-and-play swap with no modification to your bolt. You drift out the extractor pin, remove the old spring, seat the new Sprinco spring, and reassemble. Most people handle it in about ten minutes at the bench with a basic punch set.
| UPC | 657780254354 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 25435 |
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